KYIV. March 30 (Interfax) - The Ukrainian Foreign Ministry has yet to receive official explanation from Russian authorities regarding what caused the Russian Black Sea Fleet's large assault ship Tsezar Kunikov deployed in Sevastopol to fire a live artillery shell.
According to Ukrainian authorities, the vessel Tsezar Kunikov based near Nakhimov Square in downtown Sevastopol fired an AK-725 artillery system, which is used to hit air and above-water targets, without permission at 3:10 p.m. on March 26.
The command of the Russian Black Sea Fleet confirmed the incident.
The artillery shell exploded near the Laboratornoye highway in Sevastopol.
The Foreign Ministry forwarded a note to Russia requesting an explanation for the incident and demanding measures that will help prevent similar situations in the future, the ministry's press service said in a commentary on Thursday.
"Regrettably, the Foreign Ministry of Ukraine has not yet received any official explanation from the Russian side regarding this exceedingly dangerous incident," the commentary says.
The ministry is profoundly concerned about what happened in Sevastopol on March 26, it says.

The blast might have led to human deaths and caused serious damage to the city's historical sites, the Ukrainian Foreign Ministry said.